Table 2.

Litter chemical characterization in (E) E. grandis, (E+N) E. grandis with N fertilization, (A) A. mangium, and (E+A) mixed plantation between E. grandis and A. mangium at 27 and 39 months after planting.

	E		E+N		A		E+A
	27 months	39 months	27 months	39 months	27 months	39 months	27 months	39 months
Total-C (g kg−1)	521 ± 15Aa	518 ± 7Aa	526 ± 6.5Aa	519 ± 20Aa	514 ± 9Aa	517 ± 8Aa	527 ± 9Aa	519 ± 3.5Aa
Total-N (g kg−1)	8.4 ± 0.5Ca	9.1 ± 0.3Ca	8.5 ± 0.7Cb	10.3 ± 0.4Ca	14 ± 0.4Ab	16.6 ± 1.2Aa	11.5 ± 0.1Bb	13.7 ± 1.2Ba
C/N ratio	62 ± 4.5Aa	58 ± 4.83Aa	62 ± 5.5Aa	51 ± 1.2Bb	37 ± 1.8Ca	31 ± 2.0Cb	46 ± 1, 1Ba	39 ± 3.4Bb
${\text{NH}}_4^{+}$-N (mg kg−1)	95.2 ± 4.3Ba	53.2 ± 14.5Ab	60 ± 4.1Ca	36.2 ± 2.4Ab	145.6 ± 6Aa	22.1 ± 5Bb	149 ± 3.3Aa	22.4 ± 6.7Bb
${\text{NO}}_3^{-}$-N (mg kg−1)	40 ± 7ns	95.2 ± 26ns	42 ± 3ns	86.1 ± 27ns	56.3 ± 3.2ns	36.8 ± 5.9ns	69 ± 3.9ns	17.9 ± 6.7ns

Means followed by the same letter do not differ by Tukey test at a significance level of 5%. Capital letters, in the line, compared treatments within each period and lower-case letter, in the line, compare periods within each treatment. Mean Standard Deviation (±); n = 4. Total-C, Total Carbon; Total-N, Total Nitrogen; C/N, relationship between C and N concentrations; ${\text{NH}}_4^{+}$-N, ammonium ion; ${\text{NO}}_3^{-}$N, nitrate ion.